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SAR data block adjustment processing method and system

A technology of area network adjustment and data area, which is applied in image data processing, radio wave measurement system, radio wave reflection/reradiation, etc. It can solve the problems of time-consuming and labor-intensive initial positioning accuracy of manual selection of control points

Active Publication Date: 2020-12-01
BEIJING AEROSPACE HONGTU INFORMATION TECH
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  • Claims
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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a SAR data block adjustment processing method and system, to solve the time-consuming, manual selection of control points in the process of SAR data block adjustment processing existing in the prior art, Technical problems of labor consumption and low initial positioning accuracy

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  • SAR data block adjustment processing method and system

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Embodiment 1

[0028] figure 1 It is a flow chart of a SAR data area network adjustment processing method provided according to an embodiment of the present invention. like figure 1 As shown, the method specifically includes the following steps:

[0029] Step S102, acquiring the DEM data of the target area and the SAR original amplitude map of the target area.

[0030] Optionally, the original SAR amplitude map can be obtained by performing multi-look and amplitude extraction on the SAR data of the target area.

[0031] Step S104, based on the DEM data and the original SAR amplitude map, perform SAR image inversion on the target area to obtain the SAR simulated amplitude map.

[0032]Step S106 , based on the SAR simulated magnitude map, calculating coordinate conversion parameters between the SAR simulated magnitude map and the SAR original magnitude map.

[0033] Step S108, optimize the lookup table based on the coordinate conversion parameters to obtain a refined lookup table; the look...

Embodiment 2

[0095] Figure 6 It is a flow chart of another SAR data area network adjustment processing method provided according to an embodiment of the present invention. like Figure 6 As shown, the method includes:

[0096] With the help of external DEM, using the initial orbital information and using simulation technology to generate SAR simulation images that fully reflect the characteristics of the surface terrain; specifically, the original SAR data is imported, multi-view and amplitude extraction are performed to obtain SAR amplitude maps, and geocoding Obtain the lookup table, and then obtain the SAR simulation amplitude map through the inversion of the external DEM data;

[0097] Then, the image matching method is used to automatically obtain the coordinate difference of the point with the same name between the simulated image and the real image, and optimize the initial geometric positioning results of the SAR data; specifically, by transforming the coordinates of the SAR sim...

Embodiment 3

[0102] Figure 7 It is a schematic diagram of a SAR data area network adjustment processing system provided according to an embodiment of the present invention. like Figure 7 As shown, the system includes: an acquisition module 10 , an inversion module 20 , a calculation module 30 , a registration module 40 and a processing module 50 .

[0103] Specifically, the acquiring module 10 is configured to acquire the DEM data of the target area and the SAR original amplitude map of the target area.

[0104] The inversion module 20 is configured to invert the SAR image of the target area based on the DEM data and the original SAR amplitude image to obtain the SAR simulated amplitude image.

[0105] The calculating module 30 is configured to calculate coordinate conversion parameters between the SAR simulated amplitude map and the SAR original amplitude map based on the SAR simulated amplitude map.

[0106] The registration module 40 is configured to register the look-up table base...

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Abstract

The invention provides an SAR data block adjustment processing method and system. The method comprises the steps of acquiring DEM data of a target area and an SAR original amplitude diagram of the target area; performing SAR image inversion on the target area based on the DEM data and the SAR original amplitude diagram to obtain an SAR analog amplitude diagram; calculating a coordinate conversionparameter between the SAR analog amplitude diagram and the SAR original amplitude diagram based on the SAR analog amplitude diagram; optimizing a lookup table based on the coordinate transformation parameter to obtain a refined lookup table, wherein the lookup table is a data structure representing a mapping relationship of the SAR original amplitude diagram between a radar coordinate system and ageographic coordinate system; and performing block adjustment processing on the target area based on the refined lookup table. According to the method, the problem of obtaining SAR image control points in complex terrain areas in the prior art is solved, the automation degree of SAR image block adjustment is improved, and the business production requirements of large-range SAR image DOM productsare met.

Description

technical field [0001] The invention relates to the technical field of photogrammetry and remote sensing, in particular to a SAR data area network adjustment processing method and system. Background technique [0002] The patent "A Block Plane Adjustment Method for Spaceborne Synthetic Aperture Radar Images" (Application No.: CN201910048589.5) uses the RPC model to replace the original R-D model, realizing the unified processing of various image types; The network adjustment technology compensates the geometric positioning inconsistency of the Synthetic Aperture Radar (SAR) image, so that the edge accuracy of the overlapping area between the final result images and the absolute positioning accuracy with the geographic reference can meet the accuracy requirements . [0003] The patent "A method and system for correcting geometric positioning parameters of SAR images" (application number: CN201811631916.1) relates to a method for correcting geometric positioning parameters of...

Claims

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Application Information

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IPC IPC(8): G06T7/33G01S13/90
CPCG06T7/33G01S13/9021G06T2207/10044
Inventor 王宇翔路聚峰沈均平刘东升刘毅任芳付姣
Owner BEIJING AEROSPACE HONGTU INFORMATION TECH
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